Improvement in steam-engine cylinders



H. GERNER. Steam-Engine Cylinders. No. 143,008. Patented septemberza,1873.

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UNITED STATES PATENT OEE'ICE.

HENBY.GEBNEB, OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM-ENGINE CYLINDERS.

Specification forming part of Lettere Patent No. 143,008, datedSeptember 23, 1873; application filed July 1o, 1873.

To all whom t may concern:

Beit known that I, HENRY GERNEE, of the city, county, and State of NewYork, have invented certain Improvements in Steam- Engines, of which thefollowing is a specification:

The object of my invention is to provide a stronger and cheaper cylinderfor steam-engines than those heretofore known or used. By substitutingwrought metal for cast metal in constructing a steamcylinder independentof the steam-chest, a cheaper and stronger cylinder is obtained;cracking and rupturing are prevented, owing to the superior strength ofthe metal, and to the fact that the evil influences of expansion andcontraction of a steam-cylinder and steam-chest cast together are doneaway with. In case of repairs and in substituting parts, expense andtime are saved. My invention consists in a wroughtiron cylinder,constructed of a drawn tube or pipe, or by bending a true-rolled plateover a mandrel, letting the ends meet, and either riveting themtogether, with a separate piece laid over both ends, or soldering themtogether with or without this separate piece. This so-formed tube, whichmust be a perfectly true cylinder, forms the cylinder of a steam-'enginewithout ports `or inlets or outlets for the steam, as generally used,and is perfectly independent of the steam chest. Around this cylinderare laid a niunber of wooden hoops, formed in the same way, in section7as the rim of a wheel, around which is sprung or laid an iron band tohold them firmly together. The inside of this wooden rim is turned true,in a perfect circle, to Afit the outside of the cylinder. rlhesteam-chest is made of cast metal, of the same length as thcsteam-cylinder, but independent of the same. Two metal heads, in whichchannels are formed for the ingress and egress of steam to and from thecylinder, as well as both ends of the steam-chest and the joints, aremade steam tight, with suitable packings, and

grooves made in the heads. Both ends of the cylinder and chest areplaned off true. The ports in the steam-chest are made to correspondwith the channels in the heads, so that the steam will ilow through theports in the chest and the channels in the heads into and out of thesteam-cylinder. The steam cylinder and chest are placed sideby side, theheads, which are made large enough to cover the ends of the chest aswell as the cylinder, being placed over the ends of both, so that theports and channels come opposite each other, and are held in thisposition by means of bolts and nuts. The cylinder, chest, chestcovers,and heads are all lagged and-covered with wood, t0 prevent the radiationof heat and cooling of the steam.

In order more fully to describe my invention, I refer to theaccompanying drawings forming a part of this specification.

Figure l is a detached view of the cylinder, steam-chest, and heads.Fig. 2 is a detached sectional view of the cylinder, wooden rims, ironhoop, and bolts.

A is the steam-cylinder; B B, the wooden bands; C C, the metal bands 5D, the steamchest e e, the ports; F F, the heads or coverings forthehcads of the cylinder and steamchest; g g, the channels or passagesin the interior of the heads F F. h h are bolts, and M nuts, holding theheads to the cylinder. p p are wood coverings for the chest andcylinder. q g are wood coverings for the heads.

Having thus described my invention, I claim as follows:

The steam-cylinder A, with wooden bands B B and metal bands C C, incombination with the stea1n c'hest D with ports c e, and heads F F withpassages g g, substantiallyas and for the purposes hereinbefore setforth.

HENRY GERNER.

Witnesses z ANTON C. CEONDAL, FRANKLIN BARRITT.

